Pump.



PATBNTED MAE. 24, 1903.

2 SHEETS-SHEET 2.

SVB. LEIDY.

PUMP.

APPLIoATIoN FILED JAN. 1B, 1902.

No. 723,686. l

No MODEL.

UNITED STATES* PATENT OFFICE.

SYLVESTER B. LEIDY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE ENTERPRISE MANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

PUMP.

SPECIFICATION forming part of Letters Patent No. 723,686, dated March 24, 1903.

Application iiled January 18, 1902. Serial No. 90,323. (No model.`

To @ZZ whom it may concern:

Beit known that I, SYLvEsTER B. LEIDY, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Pumps, ot' which the following is a specification.

My invention relates to certain improvements in the construction of rotary pumps which are operated by a stem from driving mechanism at the head of the pump.

Myinvention, While applicable to pumps in general, is especially designed to pump molasses and like material, .the casing illustrated being attached to the lower end of a stem, the upper endof theAstem having driving mechanism and registering mechanismsuch, for instance, as that described in the patent granted to John Wilson Brown, Jr., on the 1st day of January, 1901, No. 665,390.

The object of my invention is to improve the construction of pumps of this type, so that they will be compact, can be readily made, and will accurately operate to deliver a certain quantity of .molasses or other material. This object I attain in the following manner, reference being had to the accompanying drawings, in which- Figure l is a side` view of apump-casing with a portion of the stem to which the pumpcasing is attached. Fig. 2 is a sectional plan view on the 1ine'2v2, Fig. 3. Fig. 3 is a vertical sectional view onthe line 3 3, Fig. 2. Fig. 4 is a vertical sectional view on the line 4 4, Fig. 2. Fig. 5 is a vertical sectional view on the line 5 5, Fig. 2. Figs. 6, 7, and 8 are detached perspective views of portions of the pump, and Figs. 9, l0, and 11 are views oi' modifications of my invention.

A is the pump-casing, made cylindrical in the present instance and screw-threaded at its upper end, so as to receive the screwthreaded end ofthe tubular stem C of the pump, to the upper end of which is attached the driving mechanism and through which the molasses or other materiahis forced to a suitable outlet at the head of the pump. y Secured to the bottom of the casing is a cap B, having feet b, which are comparatively sharp, so as to enter the Wood of a barrel, for instance, and give s u'cient space for the passage of the molassesv or other material to the inlet-openings of the pum-p. inlet-openings c c, Figs. 2 and 5.

The cap is secured-to the casing of the pump in the present instance by screws h;

but other means may be used withoutfdeparting from my invention.

Extending from the cap within the casing is a fixed hub B', as clearly shown in Fig. 6. This hub has vertical slots b2 at its opposite sides, and in these slots slides the laterallymovable blade E. The hub is hollow, and openings e e therein form a communication between the center of the hub and the casing. It will be noticed that the inlet-openings c c to the casing are out of line with the openings e e, leading to the interior of the hub. This is to allow acertain amount of molasses or other material to enter theV casing and to be carried around tothe dischargepassages e e.

D is a cylindricalA pist-on fitting between' the hub B and the casing A. This piston in the present instance is cut through at three points d d d, so as to form pockets into which the molasses or other material may pass from the barrel through the .inlet-passages c. 1

The'blade E is of a suflcient length to it snugly between iheinner surface of lthe piston and the casing, as shown in Fig. 2, so that as the piston is rotated ther blade willreciprocate, kthus allowing the'piston to freely rotate and yet out olf one side of the pump from the other.

If, for instance, the piston is driven in the direction of the arrow, Fig. 2, the molasses will pass up through the inlet-port cinto the chamber d and the wall d of the piston will gradually close the inlet-opening. and carry .the molasses forward and will discharge'the molasses through the outlet-opening e as it is uncovered by the rotationof thepiston.

In this cap are In the meantime the inlet-opening'h'as-been covered, so that the molasses mustpass out through the outlet-opening.

The piston D has an extension D', provided with a squared opening d? in Ithe present instance, to which is adapted an operating-rod F, Fig. 3.

In the head of the piston D are passages e', forming a com munication between the hollow pump-stem and the interior of the stationary hub B', so that the molasses or other material forced into the hub will pass freely through the ports e' into the tubular stem to the point of discharge.

The pump so constructed can be made in very small compass, the parts can be concentric so that the stem need not be arranged out of line, and the parts can be readily and cheaply manufactured owing tothe fact that the parts are concentric.

In the pump described the casing, the cap, and the hub are stationary and the piston rotates on the cap between the casing and the hub; but in some instances I may make the piston stationary or as a part of the casing, as shown in Fig. 9, and rotate the cap and the hub, the inlet-openings being formed in the cap and the outlet-openings in the hub.

Referring to Fig. 9, A' is the casing, having a flange. B2 is the rotating hub attached to the operating-stem and having a ange at its lower end forming a cap. In this flange are the inlet'openings. This rotating hub is secured in the casing by a screw-ring A2 or other suitable device, and the casing has an internal flange a, separating the pum p-chamber from the outlet-chamber communicating with the tubular stem.

While I have shown a single-bladed pump with two outlet-openings and a piston with three cavities, the number of the openings, the blades, and the cavities may be increased or decreased as desired; but I prefer to use the form shown when the pump is used for pumping molasses.

In Figs. 10 and ll I have shown a modification otthe invention, in which the outside casing is dispensed with, and as a substitute for the casing the cap B3 is secured to a ring A2 by means of bolts t', on which are spacingsleeves vl', the piston D3 being mounted between the cap and the ring, and instead of the casing forming one wall of each cavity, as shown in Fig. 2, the piston itself forms the three walls of the cavity and the hub forms the other wall.

It will be understood that the term casing Will apply to any means for holding the cap to thel tubular stem, and the piston may be either movable or stationary or the hub may be stationary or movable, as desired.

I claim as my invention- 1. The combination of a casing, a disk in the bottom of the same, a hub forming apart of the disk and having openings, a blade carried by the hub and means for causing said blade to reciprocate as one of the parts comprised by the hub and the casing is moved, together with a conduit connected with the interior of the hub, substantially as described.

2. The combination in a pump, of a casing,

the blade extends and with which the portsr communicate, substantially as described.

4. The combination in a pump, of a piston having cavities therein, a hollow hub extending into the piston and having an outlet-port, a cap having inlet-ports, said cap and hub closing the cavities in the piston, and a blade carried by the h ub,substantially as described.

5. The-combination of a casing secured to the tubular stem of a pump and forming a pump-chamber, a cap secured to said casing and having a hub extending into the pumpchamber, inlet-ports in the cap, outlet-ports in the hub, said hub being slotted, a blade mounted in the slots of the hub and arranged to move laterally, a piston having cavities into which the blade extends, said piston being capable of being rotated and having passages leading from the outlet-passage of the pumpcasing to the tubular pump-stem, substanA tially as described.

6. The combination of a casing, a cap se-` cured thereto having a hollow hub extending into [the pump-chamber therein, said hub being slotted, a blade mounted in the walls of the hub, a piston having a plurality of cavities and mounted in the casing,inletports in the cap and outlet-ports communicating with the hollow hub, with means for rotating one of the members comprised by the piston and the hub in respect to the other, substantially as described.

7. The combination of a casing, a cap secured thereto, a hollow hub extending from IIO the cap into the casing, an inlet-port in the cap and an outlet-port in the hub, said ports being staggered relatively to each other and being slotted, a movable blade mounted in the slotted hub separating one port from the other, a piston extending over the hub and having cavities into which the blade extends and means for rotating one ofthe members comprised by the piston and the hub in respect to the other, substantially as described.

8. The combination in a pump, of a casing, a tubular stem to which the casing is secured, a cap attached to the casing and having a hub extending Within the pump-chamber in the casing, a blade mounted in the hub, two in-l let-ports in the cap and two outlet-ports in the hub, one inlet and one outlet port being mounted on one side of the blade, the other ports being on the opposite side of the blade,

IZG

a piston having three cavities arranged to name to this specication in the presence of cover and uncovei` the ports, a stem by which two subscribing witnesses. the piston is driven, and passages in the upper end of the piston forming communication 5' between the hollow hub and the tubularI Witnesses:

stem, substantially as described. y ARTHUR M. HOPWOOD,

In testimony whereof I have signed my OHAS. H. SCHURBAUM.

SYLVESTER B.LE1DY. 

